$ mplayer -identify -frames 0 /vault/videos/a1/tgi.mpeg 
MPlayer 1.0rc1-4.1.1 (C) 2000-2006 MPlayer Team
CPU: AMD Athlon(tm) 64 Processor 3500+ (Family: 15, Model: 31, Stepping: 0)
MMX2 supported but disabled
3DNow supported but disabled
3DNowExt supported but disabled
CPUflags:  MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX SSE SSE2

Playing /vault/videos/a1/tgi.mpeg.
AVI file format detected.
ID_VIDEO_ID=0
ID_AUDIO_ID=1
VIDEO:  [mpg1]  640x480  24bpp  30.000 fps  3686.1 kbps (450.0 kbyte/s)
Clip info:
 Software: Lavf50.5.0
ID_CLIP_INFO_NAME0=Software
ID_CLIP_INFO_VALUE0=Lavf50.5.0
ID_CLIP_INFO_N=1
ID_FILENAME=/vault/videos/a1/tgi.mpeg
ID_DEMUXER=avi
ID_VIDEO_FORMAT=mpg1
ID_VIDEO_BITRATE=3686128
ID_VIDEO_WIDTH=640
ID_VIDEO_HEIGHT=480
ID_VIDEO_FPS=30.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=80
ID_AUDIO_BITRATE=255992
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=522.60
xscreensaver_disable: xscreensaver wid=16777217.
==========================================================================
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
ID_VIDEO_CODEC=mpeg12
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 44100 Hz, 2 ch, s16le, 256.0 kbit/18.14% (ratio: 32000->176400)
ID_AUDIO_BITRATE=256000
ID_AUDIO_RATE=44100
ID_AUDIO_NCH=2
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
ID_AUDIO_CODEC=mp3
Starting playback...


Exiting... (End of file)